Show simple item record

dc.contributor.authorKraft, R.P.
dc.contributor.authorForman, W.R.
dc.contributor.authorHardcastle, M.J.
dc.contributor.authorBirkinshaw, M.
dc.contributor.authorCroston, J.H.
dc.contributor.authorJones, C.
dc.contributor.authorNulsen, P.E.J.
dc.contributor.authorWorrall, D.M.
dc.contributor.authorMurray, S.S.
dc.date.accessioned2011-12-19T16:01:30Z
dc.date.available2011-12-19T16:01:30Z
dc.date.issued2009
dc.identifier.citationKraft , R P , Forman , W R , Hardcastle , M J , Birkinshaw , M , Croston , J H , Jones , C , Nulsen , P E J , Worrall , D M & Murray , S S 2009 , ' The jet heated x-ray filament in the Centaurus A northern middle radio lobe ' , The Astrophysical Journal , vol. 698 , no. 2 , pp. 2036-2047 . https://doi.org/10.1088/0004-637X/698/2/2036
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 172951
dc.identifier.otherPURE UUID: 7316c9eb-d285-45bd-97cc-c3f1f5bbedb9
dc.identifier.otherdspace: 2299/3651
dc.identifier.otherScopus: 85021130102
dc.identifier.urihttp://hdl.handle.net/2299/7360
dc.descriptionOriginal article can be found at: http://www.iop.org/EJ/journal/apj Copyright American Astronomical Society. DOI: 10.1088/0004-637X/698/2/2036 [Full text of this article is not available in the UHRA]
dc.description.abstractWe present results from a 40 ks XMM-Newton observation of the X-ray filament coincident with the southeast edge of the Centaurus A Northern Middle Radio Lobe (NML). We find that the X-ray filament consists of five spatially resolved X-ray knots embedded in a continuous diffuse bridge. The spectrum of each knot is well fitted by a thermal model with temperatures ranging from 0.3 to 0.7 keV and subsolar elemental abundances. In four of the five knots, nonthermal models are a poor fit to the spectra, conclusively ruling out synchrotron or IC/CMB mechanisms for their emission. The internal pressures of the knots exceed that of the ambient interstellar medium or the equipartition pressure of the NML by more than an order of magnitude, demonstrating that they must be short lived (~3 × 106 yr). Based on energetic arguments, it is implausible that these knots have been ionized by the beamed flux from the active galactic nucleus of Cen A or that they have been shock heated by supersonic inflation of the NML. In our view, the most viable scenario for the origin of the X-ray knots is that they are the result of cold gas shock heated by a direct interaction with the jet. The most plausible model of the NML is that it is a bubble from a previous nuclear outburst that is being re-energized by the current outburst. The northeast inner lobe and the large-scale jet are lossless channels through which the jet material rapidly travels to the NML in this scenario. We also report the discovery of a large-scale (at least 35 kpc radius) gas halo around Cen A.en
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.titleThe jet heated x-ray filament in the Centaurus A northern middle radio lobeen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionSPECS Deans Group
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionScience & Technology Research Institute
dc.description.statusPeer reviewed
rioxxterms.versionofrecordhttps://doi.org/10.1088/0004-637X/698/2/2036
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record